"In the '90s in Canada, you could trick ATMs by depositing an empty envelope then withdrawing the 'funds'. It was especially useful for temporary loans, like a college semester fee. I'd pay back using funds from OSAP."
"I dropped my laptop and broke the charger. I temporarily fixed it until my sister's new laptop arrived, which had an identical power. Pretending it was defective, I swapped the power supplies' identification stickers and got a 'replacement' shipped. They never asked for the faulty one back, saving me £67."